Minecraft gets stuck loading on the first screen.

When I try to load the game up, it either gets stuck on the red Mojang screen, or in special instances, the game loads up, and when i get to the Minecraft screen with Play, Settings, etc. it freezes within 5 seconds. I haven't been able to access the game in 3 days because of this bug and don't know how to fix it, and don't want to uninstall it and re-buy it. I have the digital version of the game. Any solutions?